federal health officials say 106 passengers and six crew members aboard the celebrity infinity -lrb- seen in this file photo -rrb- cruise ship were sickened by the gastrointestinal illness norovirus .
the ship was on its journey from march 29 to april 13 , federal health officials said .
the cdc 's release said ` one cdc vessel sanitation program environmental health officer and one epidemiologist have boarded the ship in san diego , 2015 to conduct an environmental health assessment and evaluate the outbreak .